Patent US2492030A successfully refreshed from Google Patents.
US2492030A
Expired / Lapsed
US
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Sealing means for valves
Assignee: ELECTRIMATIC Co
•
Filing: 1945-04-27
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Granted: 1949-12-20
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Expires: 1965-04-27
Abstract
No abstract record available.
Inventors
- 👤 Henry L Beekley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:39
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US429611A
Cited
US601591A
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DE457166C
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GB189406371A
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US884694A
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US2178490A
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US2245648A
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US2211446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |